Walter W. Bradley

1878

• California mineral production for 1918
• California mineral production for 1919, with county maps
• California mineral production for 1923
• California mineral production for 1925
• California mineral production for 1926
• Manganese and chromium in California
• Mines and mineral resources of the counties of Colusa, Glenn, Lake, Marin, Napa, Solano, Sonoma, Yolo
• Mines and mineral resources of the counties of Fresno, Kern, Kings, Madera, Mariposa, Merced, San Joaquin, Stanislaus
• Quicksilver resources of California
• California mineral production for 1916, with county maps
• California mineral production for 1917, with county maps
• California mineral production for 1920, with county maps